Dispensing device



M y 1967 J. J. MUELLER DISPENSING DEVICE 2 Sheets-Sheet 1 Filed Jan. 27,1965 mm TL MHM V mww J N% HW O J Afforneys May 11%, M67 J. .1. MUELLERDISPENSING DEVICE 2 Sheets-Sheet 2 Filed Jan. 27, 3.965

JNVENTOR. JOHN J. MUELLER M /j 6 dwjwf A fforneys United States Patents,s1s,s37 DISPENSING DEVICE .iohn .l'. lt Iueller, Richmond Heights,Ghio, nssignor to Air-Ject Corporation Filed Jan. 27, 1965,5er. No.assess I8 laims. ((l'l. 222-212) This invention relates to a dispensingdevice, and more particularly to a dispensing device having an outercontainer that is both flexible and resilient.

The dispenser of the present invention is of the constant volume type;that is, the interior of the dispenser is divided into two separatezones, one zone for the ingredients to be dispensed and the other zonefor air to displace the dispensed ingredients. The walls of the deviceare flexed to dispense the contents. The respective volumes of these twozones vary as the outer container, originally full of the ingredients tobe dispensed, is emptied through use.

This invention particularly relates to such a dispensing device having aflexible diaphragm member separating the two interior zones of thecontainer. Specifically, the flexible member is an expansi'ble andinflatable bladder or envelope within the outer container, fixed to oneinterior surface thereof, and sealed with respect to the interior of theouter container. Most advantageously, the bladder is stretchable and maybe elastic.

The outer container of the dispensing device of the present inventionincludes two openings, one communicating with the interior zonecontaining the material to be dispensed, and the other communicating tothe zone within the container defined by the expensible and inflatablebladder. A one-way valve cooperates with each of the two openings. Thevalve cooperating with the opening for dispensing the contents permitsflow only from within the container to the outside. The one-way valvecoopcrating with the opening in the bladder permits air to flow onlyfrom outside the container into the bladder. Flexing and releasing theresilient wall of the outer container dispenses the contents of thecontainer and inflates the bladder, respectively. Thus, as the contentsof the outer container are dispensed, the bladder fills with air,thereby displacing the dispensed contents and keeping the outercontainer, in etfect, always full.

The present invention is particularly useful for dispensing liowablematerials, ranging from liquids to heavy creams or pastes. Furthermore,by providing an appropriate nozzle, a spray or stream effect may beobtained. Alternatively, multiple outlets may be used and, if desired,an applicator surface may be utilized in conjunction with the dispensingoutlet.

The dispensing device of the present invention provides a convenient andinexpensive container that is, in effect, always full until empty andwhich may be readily and conveniently used in any position because thecontents are always maintained adjacent the dispensing outlet or outlets. The construction of the dispenser effectively isolates thecontents from the displacing air. Furthermore, no propellants arenecessary. Thus, the size of the container is minimized and it is underno internal pressure until the wall is flexed to dispense theingredients.

One particularly advantageous feature of the present invention is thatthe dispenser may be constructed to consistently dispense asubstantially uniform and predetermined amount of the contents with eachflexing. This is accomplished by limiting the maximum flexure of thecontainer at a predetermined location. The container, by virtue of beingalways full, will dispense the same volume each time it is squeezed.This embodiment of the present invention is particularly useful forproviding measured volumes of such things as cough medicine, cookingingredients, liquid cleansers, etc.

Other attendant advantages of this invention and of the variousembodiments thereof will be readily appreciated as the same becomebetter understood by reference to the following detailed descriptionwhen considered in connection with the accompanying drawings in which:

FIGURE 1 is a sectional view showing the construction of a dispenserconstructed in accordance with the present invention; i

FIGURE 2 is a sectional view taken along the line 22 of FIGURE 1 andshowing the manner in which the dispenser functions when squeezed todispense a fiowable material contained therein;

FIGURE 3 is a sectional view similar to FIGURE 2 showing the manner inwhich the dispenser functions upon release of pressure on the outercontainer;

FIGURE 4 is a sectional view of another embodiment of a dispenserconstructed in accordance with the present invention;

FIGURE 5 is a plurality of partial sectional views of the dispenser ofFIGURE 4, FIGURE 5A showing a covering on the external surface of thedispenser have resilient tips or fingers, FIGURE 5B showing an abrasivecovering, FIGURE 5C showing a covering of soft, absorbent material, andFIGURE 5D showing a brush-like covering;

FIGURE 6 is a sectional view of another embodiment of the presentinvention disclosing a roller dispenser applicator;

FIGURE 7 is a sectional view of another embodiment of the presentinvention disclosing a dispenser having a refillable reservoir and awick for dispensing the fluid;

FIGURE 8 is a sectional view of another embodiment of the presentinvention showing a dispenser having an open, concave, reservoir in theexternal surface;

FIGURE 9 is an elevational view, partly in section, showing a spray typedispenser embodying the present invention; and

FIGURE 10 is an expanded, sectional view showing the separate componentsand one mode of constructing a dispenser embodying the presentinvention.

Referring now to the embodiment of FIGURES 1, 2 and 3, there is shown adispensing container 15 having an outlet opening 17 and an inlet opening18. An expansible, fluid-imprevious, envelope or bladder 16 is locatedwithin the container 15.

The container 15 is a tube or bottle formed of a flexible and resilientmaterial such as a so called plastic material, for example,polyethylene. The container 15 is comprised of a continuous, upstanding,wall portion 20, a base portion 22 and top portion 24. The bottomopening 18 is formed in the base portion 22 and the top opening 17 isformed in the top portion 24.

The bladder 16 is attached in a fluid-tight, sealed, relationship to theinner surface of the base portion 22 of the container 15. The bladdersurrounds the bottom opening 18 and isolates it from the top opening 17and from the contents 19 within the container 15. Preferably, theexpansible bladder 16 is formed of a stretchable material which may beelastic, such as synthetic or natural rubber.

Associated with the base opening 18 is a one-way valve, such asschematically shown check valve 25 that allows air to pass into thesealed envelope 16 within container 15 while preventing outward passage.Associated with top opening 17 is a one-way valve, such as schematicallyshown check valve 26, that allows the passage of a flowable materialfrom container 15 through opening 17 while preventing the entrance ofair or fiowable material into the container from the outside. As shown,each check valve is biased closed by a spring 27 or 28 on the entranceside of the valve and by any pressure of a fluid trying to flow from theexit side through the valve. The

valve readily opens in response to a slight pressure increase on theentrance side of the valve relative to the exit side sufficient toovercome the bias of the spring. Suitable check valves for use withliquids and gases, as well as with more viscous flowable materials, arewell known in the art. Suitable check valves include swing type checkvalves and ball type check valves, as well as the spring biased sternvalve shown.

The embodiment of FIGURES 1-3 includes an optional stop member 30 andpressure plate 31. The pressure plate 31 is relatively rigid and isfastened to and extends across the upstanding wall 20 of the containerat a generally central location. The stop member 30 is in the form of arigid bracket fastened to the inside surface of the upstanding wallportion opposite the pressure plate 31. The stop member 30 includes ends32 and 33 extending inwardly of the container wall 20 and spaced apredetermined distance from the inner surface of the upstanding portionof wall 20 to which the pressure plate 31 is attached. This limits thedegree of flexure to which the upstanding wall 20 of the container 15can be subjected.

The manner in which the container 15 functions may be best understoodwith reference to FIGURES 2 and 3. Upon the application of pressure tothe upstanding side wall 20, as indicated by the arrow in FIGURE 2, thecontainer 15 flexes and the internal volume is reduced. The reduction involume developes a pressure within the container 15 and, in response tothis pressure, the check valve 26 in top opening 17 opens and flowablematerial within the container 15 is dispensed. During this time, thevolume contained within the flexible, expansible, bladder 16 ismaintained substantially constant by the closed check valve in thebottom opening 18. Upon the release of pressure against the upstandingside wall 20 of container 15, as shown by the arrow in FIGURE 3, theresiliency of the container wall 20 returns the wall to its originalposition, increasing the internal volume of the container and reducingthe internal pressure. Check valve 26 in the top opening 17 is, at thistime, closed by the spring 27 and the pressure external to container 15and prevents air from entering the container through the top opening 17.At the same time, check valve 25 in the bottom opening 18 of thecontainer opens as a result of the reduced internal pressure, and airflows from outside the container into the expansible bladder 16 toinflate the bladder and displace the dispensed material. When thepressure is approximately equalized, the spring 28 closes the valve 25.Because the bladder 16 displaces the dispensed material, the containerremains full and the flowable material within the container is thereforemaintained adjacent the dispensing outlet 17. Where desired, the stopmember 30 and pressure plate 31 are utilized to limit the amplitude ofthe flexure of upstanding side wall 20 when the container is squeezed.Thus, with each application of pressure to the pressure plate 31, thevolume of the container 15 is reduced a constant amount. Because theremaining flowable material within container 15 is always maintainedadjacent the dispensing outlet 17, and because there is substantially noreduction in the volume enclosed by bladder 16 when the contents aredispensed, a uniform, predetermined volume is dispensed with eachsqueeze of the container. It will be understood that other means oflimiting the flexure of the container may be used. For example, a splitring may be located within the container so as to be closed upon flexureof the walls. Alternatively, the container may be rigid except for aflexible portion or bubble that dispenses a predetermined amount whenflexed to a maximum degree.

There is shown in FIGURE 4 a flexible container 35 constructed in thegeneral configuration of a bar of soap. In the orientation of thecontainer in FIGURE 4, there are upper and lower major wall portions 37and 38, respectively, and an upstanding, peripheral wall portion 39connected thereto. A plurality of spaced dispensing openings 40 areprovided in the upper and lower wall portions 37 and 38. A check valve42 is associated with each dispensing opening 40 to allow the outwardflow -of material from within the container 35 while preventing flowinto the container. A side opening 45 is provided in the upstanding,peripheral, wall portion 39 of the container 35. Within the container 35and associated with the side opening 45 is a flexible, expansiblebladder or envelope 46 surrounding the opening 45 and sealed with theside wall, isolating the opening 45 from the dispensable contents ofcontainer 35. Optionally, a covering 47 for use with the materialdispensed through openings 40 may be adhered to one or both of surfaces37 and 38. If desired, only one of the major surfaces need have openings40. By way of example, there is shown in FIGURE 5A a covering on wall 37consisting of a multitude of protuberances, such as fingers 50, and inFIGURE 58 there is shown an abrasive covering 52, such as sandpaper orsteel wool. These materials are capable of cooperating with a dispensedmaterial, such as detergent soap, for purposes of scouring or otherwiseabrading a work piece. In FIGURE 5C there is shown a covering ofsponge-like material 54 and in FIGURE 5D a covering of a brush-likematerial 56 for applying the dispensed material, for example soap orshoe polish, from container 35 to a work article. In the same manner asalready described in connection with the embodiment of FIGURES l-3,material is dispensed from the openings 40 of the container 35 when theflexible container is squeezed. The dispensed material is displaced,upon the release of pressure on the container walls, by the entrance ofair through side opening 45 into flexible bladder 46. The bladder 46 isattached to the container about a valve containing portion of the walland is arranged to extend generally centrally of the container 35.Hydraulic pressure exerted by the flowable material when the containeris squeezed assures flow to all outlets and maintains the bladderessentially spaced from the inner wall or walls. At the same time, thematerial to be dispensed is maintained adjacent the openings 40.

Shown in FIGURE 6 is a combination roller dispenser and applicator 60embodying the principles of the present invention. The roller 60 isconstructed of an endless, flexible, cylindrical wall 62 having acircular end wall 63 at each end of wall 62. The roller is mounted forrotation about its central, longitudinal axis, as by a bracket 64, in aconventional manner. A plurality of dispensing outlets 66 extend throughthe cylindrical wall 62 at locations spaced from each other peripherallyand axially of the roller. Cooperating with each dispensing outlet 66 isa check valve 67 that permits a flowable material, such as paint,contained within the cylindrical roller 60 to be dispensed. A fabriccovering 69, typical of paint rollers, is provided on the externalsurface of the peripheral wall 62. An opening 70 is provided at acentral location in one end wall 63. An expansible bladder 72 is withinthe roller 60 surrounding the opening 70. The bladder is sealed withrespect to the end wall 63 to isolate the opening 70 from any flowablematerial contained within cylindrical roller 60. A check valve 71cooperates with the opening 70 to allow air from outside the cylindricalroller 60 to enter the bladder while preventing air already within thebladder from escaping. When pressure is applied to the flexible wall 62as the cylindrical roller 60 is passed across a surface, material, suchas liquid paint, contained within the roller 60 is dispensed throughoutlets 66. When pressure is released, the flexible wall 62 returns toits original shape, reducing the pressure within roller 60. Air entersthrough opening 70 and check valve 71 and expands bladder 72 to displacethe dispensed liquid. The bladder is shaped to allow it to extendcentrally within the roller in a manner similar to that explained inconnection with the embodiment of FIGURE 4 to maintain the material tobe disizer or spray pensed adjacent the openings 66. An opening and cap(not shown) are provided in the end wall opposite end wall 63 to permitthe roller to be refilled. Prior to or during refilling, the bladder 72is deflated by mechanically opening the check valve 71.

There is shown in FIGURE 7 an embodiment of a dispenser 73 constructedbasically in the manner of the embodiment of FIGURES 1-3 but includingan enclosed reservoir 74 in direct communication with a dispensingoutlet 75. The outlet 75 is provided through a dispenser wall 76 formingthe bottom of the enclosed reservoir 75. A check valve 77 allows fluidto flow only from the dispenser 73 to the reservoir 74. A wick or othersuitable component 78 extends through an opening 79 in the top of theenclosed reservoir 75. With this arrangement, the wick or component 78is supplied with fluid from the reservoir 74 through capillary action.The reservoir 74 may be conveniently refilled through opening 75 bysqueezing the flexible walls of the dispenser, without inverting thedispenser. By way of example, where a combustible fluid is containedwithin the reservoir 74, the wick 78 may be used to provide a flame.Where the fluid i an ink, the wick 78 may be used as a marker.

Shown in FIGURE 8 is a flexible container 80 of generally box-shapedform, having an upper wall portion 81, a base wall portion 82 and asurrounding, upstanding side wall 83. Upper wall 81 includes a recess orexposed reservoir 84. Within the recess 84 and extending through theupper wall 81 is a dispensing outlet 85. Cooperating with the outlet 85is a check valve 8% that permits a flowable material from within thecontainer 80 to be dispensed to the reservoir 84 while preventing inwardflow. An opening 87 is provided in the base wall 82. A check valve 38cooperates with the opening 87 to allow air to enter the container 80from outside while preventing outward flow. A flexible, expansible,bladder 89 is within the dispenser 80. The bladder surrounds the opening87 and is in sealed relationship with the container walls to isolate theopening 87 from the contents of the container 80 that are to bedispensed through the opening 85. When the container 88 is squeezed, asby pressing downward upon upper surface 81, flowable material within thecontainer 88 is dispensed through opening 85 into the reservoir 84,.Upon the release of such external pressure, air enters bladder 89through the opening 87 to displace the dispensed material.

There is shown in FIGURE 9 of the drawing an atomdispenser embodying thepresent invention. An outer container 90 constructed of flexible andresilient material has a base portion 91, an upstanding wall portion 92,a neck portion 93, and a nozzle 94 connected to the neck portion 93. Asolid wall 95 divides the outer container 98 into two sub-chambers 96and 97. The wall 95 extends along neck 93 and terminates at nozzle 94.There is an opening 98 in sub-chamber 96 where the neck portion 93connects with the nozzle 94-. Similarly, there is an opening 99 in thechamber 97 at the neck portion 93 adjacent the nozzle 94-. A one-wayvalve 108 and 189, respectively, is associated with each opening 98 and99 to allow fluid to be emitted from respective chambers 96 and 97 whilepreventing the flow of fluid back into the chambers. Base portion 91include two inlet openings 100 and 101, communicating, respectively,with subchambers 96 and 97. A flexible and expansible bladder 102 isprovided within sub-chamber 96, surrounding the opening 100 and sealedwith respect to the container Walls, isolating opening 100 from opening98 and from any fluid to be dispensed from sub-chamber 96. Subchamber 96is adapted to contain fluid to be sprayed, and may be filled through acapped opening 103. Subchamber 97 is adapted to contain air forentraining the liquid to be sprayed in a moving stream. Each opening 108and 181 includes a oneway valve 104 and 185, respectively, that allowsair to enter the associated subchamber while preventing outward flow. Inoperation, the wall portion 92 is squeezed to diminish the internalvolume of sub-chambers 96 and 97, creating an increased pressuretherein. This causes air contained in sub-chamber 97 and liquidcontained in sub-chamber 96 to be expelled through opening 98 and 99into nozzle 94 and out nozzle 94 as a spray of air and liquid. Upon therelease of pressure to wall 92, the resilient container returns to itsoriginal shape, reducing the pressure within sub-chambers 96 and 97. Atthis time, air enters subchamber 97 through opening 101 and check valve105 and air enters opening 100 through check valve 104 into bladder 192to replace the volume of air and liquid, respectively, displaced. Theliquid in sub-chamber 96 may be replaced through capped opening 193 bydeflating the bladder, as explained in connection with the embodiment ofFIGURE 6.

Several alternative arrangements similar to that shown in FIGURE 9 maybe constructed. For example, the spray nozzle may be replaced by astream nozzle; the opening 1011, check valve 185, and check valve 109may be eliminated and sub-chamber 97 may be filled with air throughnozzle 94 upon release of pressure to Wall 92; or bladders may includedin both sub-chambers to dispense to liquids simultaneously, either in aspray or stream, for example, two components of an epoxy resin.

One specific mode of construction and the separate components of acontainer embodying the inventive features of this invention is shown inFIGURE 10. A base 110 with a central opening 112 and a check valve 113is adapted to fit in a bottom opening of a flexible resilient container114. A bladder 115 is placed, folded or stretched over the periphery ofthe base 119 and the subassembly is fitted into the bottom opening ofthe container in fluid-tight engagement. If desired, an adhesive may beapplied between the base and bladder and between the bladder and thecontainer wall. Similarly, a valve base element 118 with a valve element119 and spring 120 may be inserted in fluidtight engagement into anoutlet opening of a container to cooperate with the container and baseassembly in providing a dispenser in accordance with the presentinvention. It will be understood that the base 118 may, alternatively bethreaded and may fit onto rather than into the container.

From the above embodiments, it will be apparent that variou flowablematerials, from extremely fluid liquids, to extremely viscous pastes maybe conveniently dispensed and, if desired, may be dispensed in apredetermined and measured volume. Furthermore, while it is believed tobe most advantageous to utilize an expansible bladder or flexibleenvelope of a stretchable material, it will be understood that aninitially full-sized but collapsed, expansible bladder or membrane maybe used. For convenience in assembly, it may be rolled or folded so asto unroll or unfold as it expands. While hydrostatic pressure of thefluid to be dispensed will prevent entrapment of fluid by the bladder,even if the bladder should initially inflate at a location Within thecontainer above the base portion, longitudinal grooves may be providedon the inner surface of the container to provide passageways to theoutlet or outlets. It will also be apparent that, if desired, theinherent resiliency of the container need not be relied upon solely toreturn the container to its initial shape, but may be assisted by othermeans, such as an internal spring, etc. Thus, it will be evident thatwhile in the foregoing disclosure certain preferred embodiments of theinvention have been disclosed, numerous modifications or alterations maybe made therein without departing from the spirit and scope of theinvention as set forth in the appended claims.

What is claimed is:

1. In a dispensing device, a flexible, resilient, container; anexpansible bladder within the container fixed to a surface thereof andsealed with respect to the interior of said container, a first openingthrough the container and communicating to the interior of said bladder,a first check valve cooperating with said first opening and constructedand arranged to allow the passage of fluid only from outside thecontainer into the bladder, whereby the bladder may be expanded, asecond opening through the container, spaced from said first opening,and communicating with a zone within the container external to thebladder, a second check valve cooperating with said second opening andconstructed and arranged to allow the passage of material only fromwithin the container to without the container.

2. The device of claim 1 including additional openings through theflexible, resilient, container, each such additional opening having acheck valve constructed and arranged to allow the passage of materialonly from within the container to without the container and each suchadditional opening communicating with a zone within the container butexternal to said bladder.

3. The device of claim 1 including a textured outer applicator surfaceupon at least a portion of said container and at least one said secondopening adjacent said textured surface.

4-. The device of claim 3 wherein the textured surface is soft andporous.

5. The device of claim 3 wherein the textured surface is hard andabrasive.

6. The device of claim 1 including means to limit the amplitude offiexure of the flexible container at a predetermined location.

7. The device of claim 1 wherein the second opening communicates with areservoir external to said container.

8. The device of claim 7 wherein said reservoir is formed by a portionof said container surface that is concave with respect to the exteriorof the container.

9. The device of claim 7 including a wick in communication with saidreservoir.

10. The device of claim 1 wherein the bladder is stretchable.

11. The device of claim 1 wherein the bladder is elastic, is fixed to abase portion of the outer container and expands from the base portionalong the interior of the outer container toward the second opening inthe container.

12. The device of claim 2 wherein the bladder is fixed to a portion ofthe outer container and extends centrally of the container remote fromall other portions of the interior surface of the container.

.13. A container for dispensing a substantially uniform volume ofmaterial with the container in any position, including a flexible,resilient, outer wall having two spaced openings and diin'ded into twofluid impervious zones, a first of said zones constructed and arrangedto contain a material to be dispensed when the outer wall of thecontainer is flexed inwardly, and a second of said zones constructed andarranged to be expanded by the introduction of ambient atmosphere aftereach time material is dispensed from said first zone when the outer wallreturns to an original shape, a first of said two spaced openingsproviding a passageway between the outside of the container and thefirst said zone, a second of said two spaced openings providing apassageway between the outside of the container and the second saidzone, a first check valve cooperating with said first opening andconstructed and arranged to permit material to flow only from within thefirst zone of the container to without the container, a second checkvalve cooperating with said second opening and constructed and arrangedto permit air to flow only from outside the container into the secondzone within the container and means for limiting maximum inward flexureof the container at a predetermined position on the container.

14. A dispenser comprising: a flexible, resilient container adapted tocontain and dispense a flowable material; a flexible, inflatablediaphragm member within the container forming a sealed envelope withrespect to the interior of the container and any flowable materialwithin the container; an opening through the container, into the sealedenvelope; means to permit passage of fluid only from outside thecontainer through the opening and into the sealed envelope; a secondopening through the container remote from the sealed envelope andadapted to directly communicate with any flowable material within thecontainer; and means to permit passage of flowable material only fromwithin the container through the second opening to outside thecontainer.

15. In a liquid spray dispenser, a flexible, resilient outer containerhaving two internal chambers; a nozzle extending from said outercontainer; first passageways from each of said internal chambers openinginto said nozzle; check valve means cooperating with each of saidpassageways opening into said nozzle and constructed and arranged topermit flow only from within each chamber to without, through saidnozzle; a second passageway in each chamber, each opening through a wallof the outer container; a check valve cooperating with each said secondpassageway and constructed and arranged to permit flow of air only fromoutside said outer container to within; and a flexible diaphragmdividing one of said two internal chambers into two sub-chambers, one ofwhich is connected via one of said second passageways to without theouter container and the other of which is connected via one of saidfirst passageways to said nozzle.

16. A liquid spray dispenser comprising a flexible, resilient outercontainer having two internal chambers; a nozzle; a passageway from eachchamber to said nozzle; a check valve in one of said passagewaysconstructed and arranged to permit flow only from within the associatedchamber to the nozzle; [an air inlet into the chamber associated withthe passageway having the check valve; a check valve cooperating withsaid air inlet constructed and arranged to permit flow only from outsidethe chamber to within; and an expansible and inflatable bladder withinthe chamber associated with the air inlet, fixed to one internal surfacethereof, isolating the air inlet from the passageway of the chamber tothe nozzle.

17. The dispenser of claim 16 wherein the bladder is elastic.

18. The dispensing device of claim 1 wherein the second check valve isconstructed and arranged to be opened solely by increased internalpressure within the container.

References Cited by the Examiner UNITED STATES PATENTS 863,260 8/1907Butterfield. 1,715,335 5/1929 Cocks 222 2,286,797 6/1942 Duerme 2l5-ll2,560,944 7/ 1951 Garrison 51-267 2,743,038 4/ 1956 Ferries 222-952,766,907 10/1956 Wallace 22294 2,820,234 l/1958 Rigney 15-543 2,947,4498/ 1960 Hernandez 22294 2,973,883 3/ 1961 Modderno 22294 3,109,19011/1963 Nelson 15-181 3,169,670 2/1965 Hrebenak et al 222-95 3,211,34810/1965 Greer 222386.5

FOREIGN PATENTS 1,358,483 3/ 1964 France.

158,377 3/1957 Sweden.

ROBERT B. REEVES, Primary Examiner. N. L. STACK, Assistant Examiner.

16. A LIQUID SPRAY DISPENSER COMPRISING A FLEXIBLE, RESILIENT OUTERCONTAINER HAVING TWO INTERNAL CHAMBERS; A NOZZLE; A PASSAGEWAY FROM EACHCHAMBER TO SAID NOZZLE; A CHECK VALVE IN ONE OF SAID PASSAGEWAYSCONSTRUCTED AND ARRANGED TO PERMIT FLOW ONLY FROM WITHIN THE ASSOCIATEDCHAMBER TO THE NOZZLE; AN AIR INLET INTO THE CHAMBER ASSOCIATED WITH THEPASSAGEWAY HAVING THE CHECK VALVE; A CHECK VALVE COOPERATING WITH SAIDAIR INLET CONSTRUCTED AND ARRANGED TO PERMIT FLOW ONLY FROM OUTSIDE THECHAMBER TO WITHIN; AND AN EXPANSIBLE AND INFLATABLE BLADDER WITHIN THECHAMBER ASSOCIATED WITH THE AIR INLET, FIXED TO ONE INTERNAL SURFACETHEREOF, ISOLATING THE AIR INLET FROM THE PASSAGEWAY OF THE CHAMBER TOTHE NOZZLE.